CN103210459A - Capacitor and process for production thereof - Google Patents
Capacitor and process for production thereof Download PDFInfo
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- CN103210459A CN103210459A CN2011800538979A CN201180053897A CN103210459A CN 103210459 A CN103210459 A CN 103210459A CN 2011800538979 A CN2011800538979 A CN 2011800538979A CN 201180053897 A CN201180053897 A CN 201180053897A CN 103210459 A CN103210459 A CN 103210459A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/005—Electrodes
- H01G4/01—Form of self-supporting electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G13/00—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/32—Wound capacitors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/008—Terminals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/43—Electric condenser making
- Y10T29/435—Solid dielectric type
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- Engineering & Computer Science (AREA)
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- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
A capacitor comprises a capacitor element (4, 304) which comprises an anode-side electrode, a cathode-side electrode and a separator (40, 42) interposed between the electrodes, an opening-sealing member (an opening-sealing plate (22)) which seals an opening of a case member for accommodating the capacitor element therein, electrode overhang parts (an anode part (6, 308), a cathode part (8, 310)) which protrude from the electrodes on the element end surface of the capacitor element, current collector plates (an anode current collector plate (12, 112), a cathode current collector plate (16, 116)), which are respectively connected to the electrode hangovers, and terminal members (an anode terminal (10, 110, 330A), a cathode terminal (14, 114, 330B)); which are arranged on the opening-sealing member and are respectively superposed on the current collector plates and of which side surface parts are welded. Thus, the resistance of the capacitor can be reduced, the connection structure can be simplified and made rigid, and the connection can be achieved readily.
Description
Technical field
The present invention relates to being connected between the outside terminal on capacitor element and the sealing part that seals at the covering parts to capacitor element, and relate to capacitor such as for example electrolytic capacitor, double electric layer capacitor etc. and the manufacture method thereof of in this connection, having used laser welding.
Background technology
In double electric layer capacitor or electrolytic capacitor, capacitor element need be electrically connected with outside terminal.Utilize this electrical connection, implement for reducing component side internal resistance, reduce the measure of the contact resistance of coupling part.
About such electrical connection, known have a following variety of way: the mode (for example, patent documentation 1) that current-collecting terminals is set at the end face of element; The anode collector plate is set and the mode (for example, patent documentation 2) of cathode collector plate is set at another end face at an end face of winding element; The mode (for example, patent documentation 3) that possesses collector plate and collector plate and collector foil are welded in the mode of the collector foil exposed on the end face that covers winding element; And with collector plate be used for being connected of shell and element or with the ways of connecting (for example, patent documentation 4) of outside terminal.
In addition, in the capacitor element of cascade type, known have a capacitor element (for example, patent documentation 5) that possesses splicing ear in element end face side.
Patent documentation 1: Japanese kokai publication hei 11-219857 communique
Patent documentation 2: TOHKEMY 2001-068379 communique
Patent documentation 3: TOHKEMY 2007-335156 communique
Patent documentation 4: TOHKEMY 2010-093178 communique
Patent documentation 5: Japanese kokai publication hei 6-275476 communique
Summary of the invention
Invent problem to be solved
In addition, each end face at convoluted element possesses in the structure of collector plate, be adjacent to be provided with at the covering parts with the covering winding element under the situation of outside terminal of anode-side and cathode side, need between each outside terminal and collector plate, guarantee to be connected distance.In addition, in convoluted element, between inside part and Outboard Sections the distribution of internal resistance different, therefore need take measures to it, need be noted element and being connected of collector plate.In addition, though in the structure of having used collector plate, can reduce the internal resistance of element, become big owing in making the way, making the reliability that is connected reduce, connect resistance to the stress that applies between outside terminal and collector plate between the element sometimes.
About such connection, though between capacitor element and sealing part, there is small space, if make this space become big, increases link or connect required interval, then resistance increases its corresponding amount, and then the height dimension of capacitor increases.If this interval (distance) is shortened, then can realize the miniaturization of capacitor by little spatialization, but there are the following problems: capacitor element shortened with being connected at interval of sealing part, connected to take a lot of trouble, and connected not exclusively.
In addition, the member end mask of capacitor element be equipped with collector plate and with structure that outside terminal parts such as outside terminal are connected in, connect collector plate and outside terminal parts by welding.In this connection, used laser welding, electron beam welding, these the welding in to welding position illuminating laser beam or electron beam, make thus weld part metal molten and become one.When carrying out such welding, because will be to welding position illuminating laser beam or electron beam, therefore need to realize contacting of collector plate and outside terminal, and in its contact portion, to welding required machining accuracy requirement is arranged.But, exist under the low situation of deviation etc., their machining accuracy at the form accuracy of collector plate, outside terminal parts, between the contact-making surface between collector plate and the outside terminal parts, produce the gap.
When between the contact-making surface that has produced such gap when illuminating laser beam, electron beam, because the influence in this gap causes the welding region change, the problem that exists welding precision to reduce.In addition, under the big situation in the gap between the contact-making surface, have that the welding scope is narrow and small, collector plate descends, is connected problems such as the resistance change is big with bonding strength between the outside terminal parts.
Not relevant with above-mentioned requirements and problem open or enlightenment in patent documentation 1～5, and not have the relevant contents such as structure of open or enlightenment and solution above-mentioned requirements and problem.
Therefore, the objective of the invention is to, in view of the above problems, realize the low resistanceization of capacitor, the simplification and the facilitation that is rugged and is connected of connection structure.
In addition, the objective of the invention is to, in view of the above problems, a kind of influence of the machining accuracy that can not be subjected to collector plate, outside terminal parts is provided and has improved the welding precision between collector plate and the outside terminal parts, the capacitor of bonding strength.
For the means of dealing with problems
In order to achieve the above object, capacitor of the present invention possesses: capacitor element, and it is to possess the electrode body of anode-side and cathode side and winding element or the non-winding element of the separator between these electrode body; Sealing part, it will take in the peristome sealing of the housing parts of described capacitor element; Single or a plurality of electrode protuberances, the element end face that its any one party from described electrode body or both sides protrude from described capacitor element; Single or a plurality of collector plates, it is connected with described electrode protuberance; And terminal component, it is arranged on the described sealing part, and is overlapping with described collector plate, and the side surface part of this terminal component is soldered on the described collector plate.
In order to achieve the above object, in above-mentioned capacitor, can be that described electrode protuberance is the aggregate that the part by described electrode body forms,, on described element end face, and engage with described collector plate towards the element central part brake forming of described capacitor element.
In order to achieve the above object, in above-mentioned capacitor, can be, described electrode protuberance is any one party or the both sides in anode protuberance, the negative electrode protuberance, described anode protuberance protrudes from the element end face from the described electrode body of the anode-side of described capacitor element, and described negative electrode protuberance protrudes from and described element end face components identical end face or different element end face from the described electrode body of the cathode side of described capacitor element.
In order to achieve the above object, in above-mentioned capacitor, can be, be arranged at described anode protuberance and described negative electrode protuberance under the situation of identical described element end face of described capacitor element, will insulate between described anode protuberance and the described negative electrode protuberance by insulation gap or insulating element are set.
In order to achieve the above object, in above-mentioned capacitor, can be, described collector plate possesses: single or a plurality of the 1st welding are facial, its with the described element end face of described capacitor element on single or a plurality of welding faces of forming in part or all of single or a plurality of electrode protuberances of forming weld; And the 2nd welding facial, it is arranged at and the facial side surface part of intersecting of described the 1st welding, welds with described terminal component.
In order to achieve the above object, it in above-mentioned capacitor, can be that described electrode protuberance possesses: a plurality of division portion, its centered by the element central part of described element end face according to the rules angular divisions form, with the center position bending of identical or different angle of bend to described element end face; And single or a plurality of welding are facial, and it is formed on the described element end face by described division portion.
In order to achieve the above object, in above-mentioned capacitor, can be, possess the par at described collector plate, this par with respect to the side surface part of described terminal component welding, outstanding towards peripheral direction.
In order to achieve the above object, in above-mentioned capacitor, can be, described terminal component be welded on the described collector plate by laser welding or electron beam welding, and the irradiation position of laser beam or electron beam is different from the contact-making surface of described collector plate and described terminal component.
In order to achieve the above object, in above-mentioned capacitor, can be, this capacitor possesses weld part, this weld part covers the contact-making surface of described collector plate and described terminal component by the covering portion on described collector plate or the described terminal component of being formed at, by welding described collector plate and described terminal component to described covering portion's illuminating laser beam or electron beam.
In order to achieve the above object, in above-mentioned capacitor, can be, the described irradiation position of described laser beam or described electron beam be consistent with the contact-making surface of described collector plate and described terminal component, perhaps with direction that described contact-making surface intersects on different with described contact-making surface.
In order to achieve the above object, in above-mentioned capacitor, can be that the nugget degree of depth of described laser welding or described electron beam welding is below 1.2 (mm).
In order to achieve the above object, the manufacture method of capacitor of the present invention comprises following operation: for the capacitor element as winding element or non-winding element of the electrode body that possesses anode-side and cathode side and the separator between these electrode body, make described electrode body protrude from the element end face of described capacitor element, form single or a plurality of electrode protuberances at described element end face; And the terminal component that will be arranged on the sealing part is overlapping with the single or a plurality of collector plates that are connected in described electrode protuberance, the side surface part of described terminal component and the side surface part of described collector plate are welded, and described sealing part will be taken in the peristome sealing of the housing parts of described capacitor element.
In order to achieve the above object, in the manufacture method of above-mentioned capacitor, can be, this manufacture method also comprises the operation that the side surface part of described collector plate is positioned the described side surface part of described terminal component, and making becomes common face between the described side surface part and implement described welding.
In order to achieve the above object, in the manufacture method of above-mentioned capacitor, can be, this manufacture method comprises following operation: described terminal component and described collector plate is overlapping, and described terminal component is contacted with described collector plate; And the irradiation position that makes laser or electron beam is different from the contact-making surface of described collector plate and described terminal component, and described collector plate and described terminal component are welded.
In order to achieve the above object, in the manufacture method of above-mentioned capacitor, can be, this manufacture method comprises following operation: possess covering portion at described terminal component or with any one party in the described collector plate that described electrode protuberance is connected, utilize this covering portion to cover the contact-making surface of described terminal component and described collector plate; And the irradiation position of laser beam or electron beam is set in described covering portion, described collector plate and described outside terminal parts are welded.
In order to achieve the above object, in the manufacture method of above-mentioned capacitor, can be, the described irradiation position of described laser beam or described electron beam be consistent with the contact-making surface of described collector plate and described terminal component, perhaps with direction that described contact-making surface intersects on different with described contact-making surface.
In order to achieve the above object, in the manufacture method of above-mentioned capacitor, can be, this manufacture method also comprises following operation: overlapping described collector plate on described electrode protuberance, on this collector plate, set sealing wire in the direction of intersecting with the electrode body of described capacitor element, weld along this sealing wire.
In order to achieve the above object, in the manufacture method of above-mentioned capacitor, can be, across insulation gap and a plurality of positions of relative described collector plate, be adjacent to set the described sealing wire more than 2, be welded on the adjacent described sealing wire more than 2 in privileged site place of the element central part of crossing over capacitor element continuously, afterwards, weld the described sealing wire more than 2 at described privileged site position in addition continuously, at a plurality of positions, weld the described electrode protuberance of described collector plate and described capacitor element by the adjacent described sealing wire more than 2.
In order to achieve the above object, in the manufacture method of above-mentioned capacitor, can be, this manufacture method also comprises following operation: at described electrode protuberance described collector plate is set, set from the welding starting point to the sealing wire that welds terminal point at this collector plate, by interim ground or change continuously to the wire harness irradiation of the wire harness output of this sealing wire Continuous irradiation, described collector plate is connected on the described electrode protuberance.
In order to achieve the above object, in the manufacture method of above-mentioned capacitor, can be, this manufacture method comprises following operation: the described element end face that is arranged at described capacitor element and with described collector plate that anode-side or cathode side are connected on, form the 1st circular-arc joint face in the side surface direction of described capacitor element; Form the 2nd joint face that is concentric circles with the described joint face of described collector plate at the described terminal component that is connected with described collector plate; Align described the 1st joint face and described the 2nd joint face utilize described capacitor element or to the welding unit of described the 1st joint face and described the 2nd joint face irradiation wire harness, described capacitor element or welding unit are rotated; And described the 1st joint face welded to be connected described collector plate and described terminal component with described the 2nd joint face.
In order to achieve the above object, in the manufacture method of above-mentioned capacitor, can be, element center with described capacitor element is benchmark, described the 1st joint face and described the 2nd joint face are formed concentric disc, be pivot with described element center, described capacitor element or described welding unit are rotated.
In order to achieve the above object, in the manufacture method of above-mentioned capacitor, can be, described wire harness be fiber laser beam.
The invention effect
According to capacitor of the present invention or its manufacture method, can obtain following arbitrary effect.
(1) collector plate that will be connected with single or a plurality of electrode protuberances is overlapping with the terminal component that is positioned on the covering parts, between side surface part, be welded to connect, wherein, described single or a plurality of electrode protuberance is that any one party or the both sides from the electrode body of the anode-side of capacitor element or cathode side are drawn out to the element end face, therefore, can make that the required spatial portion of connection is narrow and small, strengthened connection simultaneously, improved the reliability that connects, and can realize the low resistanceization of capacitor element, can realize low ESRization.
(2) the electrode protuberance at the identical or different element end face that protrudes from capacitor element has connected collector plate, therefore, utilize collector plate to connect each electrode body of anode-side or utilize collector plate to connect each electrode body of cathode side, therefore can realize the low resistanceization of capacitor element.
(3) because be that collector plate is clipped in from the structure that is connected between the terminal component of the outstanding electrode protuberance of the electrode body of capacitor element and sealing part side, therefore can realize the simplification that connects, and being rugged of realizing that connection constructs.
(4) according to above-mentioned structure, can easily realize being connected of electrode protuberance and terminal component across collector plate, can realize connecting the simplification of operation, can connect processing in short time again, can reduce manufacturing cost.
(5) any one party in sealing part, outside terminal or collector plate arranges positioning unit, can decide the link position of outside terminal and collector plate by positioning unit, can realize sameization of coplanar laser illumination uniformly, realize the stable of connection, realize the high connection of reliability.
(6) laser beam or electron beam are shone the position different with the contact-making surface of collector plate and terminal component, therefore can with the state of the contact-making surface of collector plate and terminal component irrespectively with both welding.
(7) tabular surface of collector plate side that can select to cover the contact-making surface of collector plate or terminal component or collector plate and terminal component comes illuminating laser beam or electron beam, therefore even under the low situation of the machining accuracy of the contact-making surface of collector plate and terminal component, even and have a gap, also can obtain best welding scope, improve welding precision and weld strength between collector plate and the terminal component.
(8) by being positioned at the contact-making surface that covering portion on collector plate or the terminal component covers collector plate and terminal component, therefore and to this covering portion illuminating laser beam or electron beam, can irrespectively both be welded with the state of the contact-making surface of collector plate and terminal component.
(9) overlapping collector plate on the electrode protuberance, weld towards the sealing wire of the periphery direction of described capacitor element in this collector plate setting, therefore can shorten required weld time of electrode protuberance and being connected of collector plate, the simplification of realization manufacturing process.
(10) interim ground or continuously decay with export from the corresponding wire harness of the sealing wire of the origin-to-destination of the wire harness welding of the electrode protuberance of collector plate and capacitor element, therefore can make that the welding energy that is applied to collector plate and electrode protuberance is even, connectivity can be improved, stable being welded to connect can be realized.
(11) possesses the 2nd joint face that mates with the 1st joint face that is connected to the collector plate on the capacitor element at terminal component, these the 1st and the 2nd joint faces are welded, therefore being connected between collector plate and the terminal component can be easily realized, the reliability of connection can be improved.
In addition, by reference accompanying drawing and each execution mode, can clear and definite more other purpose of the present invention, feature and advantage.
Description of drawings
Fig. 1 is the sectional view of an example that the double electric layer capacitor of the 1st execution mode is shown.
Fig. 2 is the exploded perspective view that each parts of double electric layer capacitor are shown.
Fig. 3 illustrates the stereogram that a part has been carried out an example of the capacitor element after the decomposition.
Fig. 4 is the figure that the example before and after the moulding of electrode portion of capacitor element is shown.
Fig. 5 is the figure that an example of collector plate is shown.
Fig. 6 is the figure that the capacitor element that possesses the collector plate that has carried out laser welding is shown.
Fig. 7 is the figure that is connected that collector plate and outside terminal on the capacitor element are shown.
Fig. 8 is the flow chart of an example of manufacturing process that the double electric layer capacitor of the 2nd execution mode is shown.
Fig. 9 is the figure that the completed state of the anode portion of capacitor element and negative pole part is shown.
Figure 10 is the figure that is connected operation that capacitor element and collector plate are shown.
Figure 11 illustrates the collector plate of the 3rd execution mode and the figure that is connected of outside terminal.
Figure 12 illustrates the collector plate of the 4th execution mode and the figure of connection thereof.
Figure 13 is collector plate that the 5th execution mode is shown and being connected and the figure of location of outside terminal.
Figure 14 is the exploded perspective view that other execution mode of the double electric layer capacitor that possesses the terminal connecting plate is shown.
Figure 15 is the figure that the welding portion of anode collector plate and anode terminal is shown enlargedly.
Figure 16 is the figure that the welding form of laser beam is shown.
Figure 17 is the figure that the nugget (nugget) that forms by heat conduction weld is shown.
Figure 18 is the figure that the welding portion of anode collector plate and anode terminal is shown enlargedly.
Figure 19 is the figure that the nugget that forms by heat conduction weld is shown.
Figure 20 is the figure that other nugget that forms by heat conduction weld is shown.
Figure 21 is the figure that sealing wire, laser output and output waveform are shown.
Figure 22 is the figure that illustrates an example of the laser irradiation of the collector plate of the 10th execution mode and outside terminal.
Figure 23 is the figure that the welding example of collector plate and outside terminal is shown.
Embodiment
(the 1st execution mode)
The 1st execution mode is to connect outside terminal at the collector plate that is connected with the element end face of capacitor element, forms the structure of outside terminal at capacitor element.
About the 1st execution mode, with reference to Fig. 1 and Fig. 2.Fig. 1 shows the longitudinal section of an example of expression double electric layer capacitor, and Fig. 2 shows the example with the double electric layer capacitor after the part decomposition.
This double electric layer capacitor 2 is examples of capacitor of the present invention.In this double electric layer capacitor 2, as shown in Figure 1, be formed with anode portion 6 and negative pole part 8 at the identity element end face of capacitor element 4.Anode portion 6 and negative pole part 8 are examples of electrode protuberance, and (anode bodies 60 and cathode 80: part Fig. 3) constitutes by the electrode body of drawing from the element end face 5 of capacitor element 4.When connecting anode portion 6 with anode terminal 10, utilized marginal anode collector plate 12, and, marginal cathode collector plate 16 when connecting negative pole part 8 with cathode terminal 14, utilized.Carrying out these when connecting, for example utilize laser welding or electron beam welding, the 18th, be welded to connect an example of portion.In addition, anode terminal 10 and cathode terminal 14 are that anode terminal 10 is examples of anode terminal parts be used to the terminal component that carries out outside connection, and cathode terminal 14 is examples of cathode terminal parts.In this embodiment, the outer peripheral face of the anode portion 6 that is connected with anode collector plate 12 and the negative pole part 8 that is connected with cathode collector plate 16 is provided with insulation unit 17.Utilize this insulation unit 17 to realize the insulation of capacitor element 4 and shell 20.As this insulation unit 17, for example can use insulating material such as insulating paper, insulating tape.
As the covering parts of capacitor element 4, possess shell 20 and hush panel 22.Shell 20 is to have the formed body that the metal material of mouldability constitutes by for example aluminium etc.Hush panel 22 is peristomes 30 of sealing shell 20, keeps the bubble-tight unit of spatial portion 24, and is the fixed part of fixed anode terminal 10 and cathode terminal 14, has constituted the support unit of capacitor element 4.In this embodiment, possess base portion 26 and closure 28 in hush panel 22.Base portion 26 is formed by for example synthetic resin as insulating material, is fixing anode terminal 10 and cathode terminal 14, and with anode terminal 10 and cathode terminal 14 insulation.Closure 28 by the high material of seal for example rubber ring constitute.
This hush panel 22 is inserted in the peristome 30 of shell 20, and is positioned to the ca(u)lk end difference 32 that forms at the middle part place of peristome 30 sides.The open end 34 of shell 20 is handled by crimping and is carried out ca(u)lk, and is embedded on the closure 28.Thus, shell 20 is sealed securely.And, be formed with open-work 36 in the base portion 26 of hush panel 22, and be formed with the pressure release mechanism 38 that is constituted by TR thin rubber.
Then, about capacitor element 4, with reference to Fig. 3.Fig. 3 shows a part is decomposed and the capacitor element of expression.
As shown in Figure 3, this capacitor element 4 possesses anode bodies 60, cathode 80, separator 40,42, each separator 40,42 that antianode body 60 and cathode 80 insulate between the two is clipped between anode bodies 60 and the cathode 80 reels, and has constituted winding element cylindraceous.In the base material of anode bodies 60 and cathode 80, for example use aluminium foil, be formed with the polarizing electrode that contains active carbon isoreactivity material and binding agent etc. on the two sides of this aluminium foil.
In addition, in this capacitor element 4, between the anode portion 6 that is formed at same end face side and negative pole part 8, be provided with the insulation gap 44 of fixed width.Anode portion 6 is for example formed by the base material of anode bodies 60, and same, negative pole part 8 is also formed by the base material of cathode 80.Under the situation that anode bodies 60 and cathode 80 are formed by aluminium, anode portion 6 and negative pole part 8 are the base material portions of having exposed the aluminium face that does not form polarizing electrode.
The forming portion of anode portion 6 or negative pole part 8 is to liken the separator 40 into the insulation unit, 42 the outstanding form of width W to, forms the length L corresponding with the arc length of each anode portion 6 or negative pole part 8.In each anode portion 6 and negative pole part 8 outstanding with length L, as the preparation processing of bending process, parallel with element end face 5 and be formed with fold line 43 from the position that element end face 5 exposes a little.This fold line 43 is such bends: it makes overbending direction portion become bending to the inside at each anode portion 6 and negative pole part 8.
And, shown in Fig. 2 (the perhaps B of Fig. 4), the anode portion 6 of capacitor element 4 or negative pole part 8 with before anode collector plate 12 or cathode collector plate 16 are connected by processing with the element end face of being close to state and being formed on capacitor element 4 on.
Then, about anode portion 6 and the negative pole part 8 of capacitor element 4, with reference to Fig. 4.Fig. 4 shows the anode portion of capacitor element and an example of negative pole part, before A represents the moulding of anode portion and negative pole part, after B represents the moulding of anode portion and negative pole part.In Fig. 4, for the part mark same-sign identical with Fig. 1, Fig. 2 and Fig. 3.
Shown in the A of Fig. 4, on the element end face 5 of capacitor element 4, erectly be provided with the anode portion 6 and the negative pole part 8 that constitute the electrode protuberance, between these anode portion 6 and negative pole part 8, be set with the insulation gap 44 of Rack.The center of insulation gap 44 is taken as Y Shaft, the direction vertical with this Y Shaft is taken as X Shaft, centered by X Shaft, about set angle θ
1, θ
2(〉 θ
1) divide.At angle θ
1The place is provided with a plurality of otch 48 in radial direction centered by the coiling central part (coiling core) 46 of capacitor element 4, be formed with a plurality of division 6A of portion, 6B, the 6C that is divided by each otch 48 in anode portion 6 sides.Equally, also be formed with a plurality of division 8A of portion, 8B, 8C in negative pole part 8 sides.If with angle θ
1For example be set at 33 (°), then the 6A of division portion, 8A become 2 θ
1=66 (°), the 6B of division portion, the 6C that forms across the 6A of division portion or across the 8A of division portion and the 8B of division portion that forms, the angle θ of 8C
2Be set to θ
2=57 (°).
The degree of depth about otch 48, for example will give prominence to length setting is the height h1 of anode portion 6 and negative pole part 8, make the 8A of division portion, 8B, 8C portion's bending halfway of the 6A of division portion, 6B, 6C and the negative pole part 8 of anode portion 6, compression forming is carried out in element central part thruster to capacitor element 4, shown in the B of Fig. 4, be shaped to the 6A of each division portion, 6B, 6C and the 8A of division portion, 8B, 8C thus.In this embodiment, the 6B of each division portion, 6C and the 8B of division portion, 8C are set to welding portion.Therefore, the projecting height h2 of the 6A of division portion, 8A is set at the height h3 that is higher than the 6B of each division portion, 6C, 8B, 8C, makes that the height of the 6A of division portion, 6B, 6C and the 8A of division portion, 8B, 8C is corresponding with the curved shape of anode collector plate 12 and cathode collector plate 16.
In addition, for anode portion 6 and the negative pole part 8 of capacitor element 4, by towards the element center position whole anode portion 6 and negative pole part 8 being carried out compression forming in this wise, can suppress height dimension thus.In this embodiment, the 6B of division portion, the 6C of antianode portion 6 compresses and forms and form the joint face of stable flat condition, afterwards, the 6A of division portion as disconnected is carried out compression forming, suppressed the height dimension owing to the overlapping boundary portion that produces of 6A-6B, 6A-6C between each division portion.About the inhibition of the height dimension of this boundary portion, like this too for negative pole part 8.
Then, about anode collector plate 12 (perhaps cathode collector plate 16), with reference to Fig. 5.Fig. 5 shows an example of anode collector plate (perhaps cathode collector plate), and A represents its plane, and B represents from being welded to connect the portion side side when observing anode collector plate (perhaps cathode collector plate).
This anode collector plate 12 is formed by for example aluminium sheet identical with electrode material, cover the 6A of division portion, 6B, the 6C (Fig. 4) of described anode portion 6, possess following shape and area: described shape and area have and the 6B of division portion, 6C between the laser welding area and have and anode terminal 10 between the laser welding area.In this embodiment, 1/2nd size of the element end face 5 that this anode collector plate 12 is capacitor elements 4, the shape as guaranteeing insulation gap 44 is roughly semicircular plate.
Shown in the A of Fig. 5, on anode collector plate 12, at string side central part place, be formed with circular-arc notch 50 accordingly with the coiling central part 46 of capacitor element 4, its arc side be formed with connect facial 52, this connections facial 52 be centered by X Shaft on the direction vertical with X Shaft linearly shape cut off and formation.In addition, shown in the B of Fig. 5, on this anode collector plate 12, formed circular-arc terminal connecting portion 56A and element connecting portion 56B, 56C based on end difference 54, described end difference 54 be centered by circular-arc notch 50, namely centered by X Shaft about angle θ
1The place curves the right angle and forms.Each terminal connecting portion 56A and element connecting portion 56B, 56C form tabular surface respectively, constitute parallel surface across end difference 54.
In this anode collector plate 12, when the height of establishing terminal connecting portion 56A is h
4, anode collector plate 12 thickness be that the height of t, terminal connecting portion 56A inboard is h
5The time, be set at:
h
5=h
4-t≧h
2-h
3···(1)
Therefore, the height h of terminal connecting portion 56A inboard
5Absorbed the projecting height h of the 6A of division portion, 8A
2Height h with the 6B of each division portion, 6C, 8B, 8C
3Between difference delta h (≧ h
2-h
3), anode collector plate 12 is set to be close to the 6B of each division portion, 6C, and takes in the 6A of division portion.In addition, the thickness t of anode collector plate 12 also can be at the position of element connecting portion 56B, 56C and terminal connecting portion 56A change thickness.For example, can be than element connecting portion 56B, 56C thick (more than 1.2 times) with the thickness setting of terminal connecting portion 56A, thus, when the laser welding of carrying out with anode portion 6, the terminal connecting portion 56A that the heating that produces in element connecting portion 56B, 56C is had specific thickness absorbs, and has improved the connection precision of laser welding.
About such structure and and other parts between relation, like this too for cathode collector plate 16.
Then, about anode collector plate 12 and cathode collector plate 16 and the anode portion 6 of capacitor element 4 and being connected of negative pole part 8, with reference to Fig. 6.Fig. 6 shows anode collector plate and the configuration of cathode collector plate and the example of connection status on the element end face of capacitor element.
As shown in Figure 6, anode collector plate 12 and cathode collector plate 16 are configured centered by coiling central part 46 on an end face of capacitor element 4, and circular-arc notch 50 is in alignment with coiling central part 46, and and anode portion 6 and negative pole part 8 between insulation gap 44 set at interval 61 accordingly.On anode collector plate 12, the 6A of division portion of the anode portion 6 of capacitor element 4 is positioned and is close to the lower face side of terminal connecting portion 56A, and the 6B of division portion of the anode portion 6 of capacitor element 4,6C is positioned and be close to the lower face side of element connecting portion 56B, 56C.And, in laser irradiation connecting portion 66, utilize from the periphery direction of capacitor element 4 and shine towards the laser of element central part direction, make the 6B of division portion, 6C and element connecting portion 56B, 56C melt partially or entirely to connect.Cathode collector plate 16 sides that are connected so also are the same.
As shown in Figure 6, in this embodiment, each two position of element connecting portion 56B, 56C that the position of laser irradiation is separated by the end difference 54 of anode collector plate 12 and cathode collector plate 16, i.e. laser irradiation connecting portion 66.In this case, as shown in the arrow (1) of laser irradiation connecting portion 66 places mark, (2), (3) and (4), carry out the laser irradiation.In this laser irradiation, utilize inert gases such as argon gas, helium to come capacitor for voltage protection element 4 as protective gas (shield gas), avoid laser heating or splash to the influence of capacitor element 4.
(1) from the outer circumferential side of capacitor element 4 towards the element center position, the element connecting portion 56B to a side anode collector plate 12 carries out this laser irradiation linearlyly.
(2) then,, to across coiling central part 46 and the element connecting portion 58B of relative the opposing party's cathode collector plate 16 carries out the laser irradiation, thus, weld by a series of action towards the element peripheral direction from the element central side linearlyly.
(3) and similarly, towards the element center position, the element connecting portion 56C to a side anode collector plate 12 carries out the laser irradiation linearlyly from the outer circumferential side of capacitor element 4.
(4) then, from the element central side towards the element outer circumferential side, linearlyly to across coiling central part 46 and the element connecting portion 58C irradiating laser of relative the opposing party's cathode collector plate 16 welds by this a succession of action.
Like this, by carry out a succession of action of laser irradiation across coiling central part 46 linearlyly, anode portion 6 is connected with cathode collector plate 16 with anode collector plate 12, negative pole part 8.In other words, set towards the diametric sealing wire of capacitor element 4 (laser irradiation connecting portion 66) across coiling central part 46, antianode portion 6 and negative pole part 8 weld with each collector plate 12,16, therefore, the required weld time that is connected between anode portion 6 and negative pole part 8 and each collector plate 12,16 can be shortened, the simplification of manufacturing process can be realized.In addition, repeat a succession of action of (1) and (2) of 2 laser irradiations.Perhaps, repeat a succession of action of (1) to (4) of 2 laser irradiations, and dispose weld part nearby, can further reduce connection resistance thus.Though a succession of action of (1) and (2) that can be by laser irradiation connects, but also can be from the element central side towards the element outer circumferential side, each element connecting portion 56B of linearly ground antianode collector plate 12, cathode collector plate 16,56C, 58B, 58C shine respectively etc., connect individually.
In addition, continuous action about (1) to (4) of laser irradiation, if not to same position Continuous irradiation laser, but carry out laser welding from (1) to (4), from (1) to (4) carries out the laser irradiation more afterwards, then can set interval its result at the laser irradiation at same position, can realize the cooling of laser irradiating part position, make by the connection of laser welding realization stable.In addition, though also can set interval and carry out repeatedly laser irradiation same position, if but carry out primary laser welding according to (1) to (4), and then carry out laser welding according to (1) to (4), then can obtain chilling room every, the laser irradiation can be carried out again continuously, the shortening of the weld time of laser irradiation can be realized.
About the continuous action of (1) to (4) of the irradiation of this laser, can interim ground or continuously decay with export from the corresponding laser of the sealing wire of the origin-to-destination of each laser irradiation.Particularly, from origin-to-destination the laser output in 3 intervals is set, is made as laser output Pa, the laser output Pb between the mesozone, the laser output Pc between the outrun between the origin zone, make laser output according to Pa Pb, Pb the mode of Pc decays.Laser output Pa between the origin zone is set to peak, is 50 (W)～3000 (W) as an example.Laser output Pb is the following laser outputs of 90 (%) of laser output Pa, and laser output Pc is the laser output below 80% of laser output Pa.Like this, by interim ground or the decay laser output corresponding with the sealing wire of the origin-to-destination that shines from each laser continuously, can make that the welding energy that imposes on collector plate 12,16, anode portion 6 and negative pole part 8 is even, connectivity can be improved, stable being welded to connect can be realized.Namely, be subjected to the anode collector plate 12 of laser irradiation or the sealing wire of cathode collector plate 16 and anode portion 6 or negative pole part 8 (laser irradiation connecting portion 66) and near portion thereof and obtain heating, if carry out the laser irradiation along sealing wire, then with the scanning of laser irradiation correspondingly, heating is moved with chain state together with this scanning, therefore, even laser output is not set at identically, also can become molten state chainly.Therefore, even if make laser output stage ground and decay continuously, the heat energy that is produced by the laser irradiation that is applied to weld part also is uniform.Therefore, improved the connectivity of anode collector plate 12 or cathode collector plate 16 and anode portion 6 or negative pole part 8.
In addition, as shown in Figure 4, be formed with anode portion 6 and negative pole part 8 at the element end face 5 of capacitor element 4.Between anode portion 6 and negative pole part 8, be provided with when center position carries out compression forming, do not allow anode portion 6 and negative pole part 8 contacted insulation gaps 44, therefore, at (in element central part 2mm) near the coiling central part 46 of capacitor element 4, do not form anode portion 6 and negative pole part 8.In addition, the formation position of anode portion 6 and negative pole part 8 more many (perhaps area is more big) more helps the reduction of resistance, therefore, as not allowing anode portion 6 contact with negative pole part 8 and can realizing the insulation gap 44 of low resistanceization, for example set 3 (mm)～15 (mm).In addition, can be at the most peripheral of capacitor element 4, outer peripheral face at the anode portion 6 that is connected with anode collector plate 12 and the negative pole part 8 that is connected with cathode collector plate 16 arranges insulation unit 17 (Fig. 1) such as insulating paper or insulating tape, make thus: even skew etc. takes place when the compression forming of anode portion 6 and negative pole part 8, anode portion 6 and negative pole part 8 can not contact with shell 20 yet.If along periphery, not only covering this anode portion 6 and negative pole part 8, and the mode that covers anode terminal 10, cathode terminal 14, anode collector plate 12, cathode collector plate 16 arranges this insulation unit 17, then can realize the insulation with shell 20.
Then, about being connected of anode terminal 10 and anode collector plate 12 and being connected of cathode terminal 14 and cathode collector plate 16, with reference to Fig. 7.Fig. 7 shows anode terminal and is connected with the anode collector plate with anode collector plate, cathode terminal, and A shows the state before being connected of anode terminal and anode collector plate, cathode terminal and anode collector plate, and B shows the figure of laser irradiation.As shown in Figure 7, anode terminal 10, the cathode terminal 14 that is positioned on the hush panel 22 is positioned on the capacitor element 4 that is connecting anode collector plate 12 and cathode collector plate 16.Anode terminal 10 and cathode terminal 14 are formed with terminals side joint face 64 in side surface part, this terminals side joint face 64 be with anode collector plate 12 and cathode collector plate 16 on be connected and facial 52 form same side wall surface.Therefore, if make these connect facial 52 and terminals side joint face 64 alignment and carry out laser irradiation 68, then the described portion 18 that is welded to connect is by laser welding, can connect facial 52 and terminals side joint face 64 between be welded together.
Therefore, by the portion that is welded to connect 18 that is realized by laser irradiation 68, feasible anode terminal 10 as outside terminal is connected on the anode portion 6 of capacitor element 4 via anode collector plate 12, and, by the portion that is welded to connect 18 that is realized by laser irradiation 68, feasible cathode terminal 14 as outside terminal is connected on the negative pole part 8 of capacitor element 4 via cathode collector plate 16, thereby forms outside terminal at capacitor element 4.
At this, if the interval (distance) between capacitor element 4 and the hush panel 22 is long, then resistance correspondingly increases therewith, and the increase of the height dimension of double electric layer capacitor 2, has therefore shortened the interval (distance) between capacitor element 4 and the hush panel 22 as much as possible.For in such small space, connect anode terminal 10 and cathode terminal 14 and anode collector plate 12 and cathode collector plate 16, as mentioned above, make connection facial 52 and terminals side joint face 64 become consistent common face, weld by the laser irradiation 68 that can realize local welding at this position, realized simplification and the reinforcement of welding thus.At this, the thickness of anode collector plate 12 and cathode collector plate 16, anode terminal 10 and cathode terminal 14 (height dimension that connects face 52 and terminals side joint face 64) is set to the scope of 0.5 (mm)～5 (mm) respectively, become the size that to carry out laser welding thus, and internal resistance is difficult to increase, and can also shorten the height dimension of double electric layer capacitor 2.
In addition, though connection facial 52 and terminals side joint face 64 are to constitute the plane by otch, being not limited thereto, also can be curved surface, so long as consistent face gets final product.In addition, connect face 52 and terminals side joint face 64 and also can be respectively inclined plane (taper surface), in addition, sometimes can be owing to machining accuracy produces the gap between connection facial 52 and terminals side joint face 64.
In addition, about connecting face 52 and terminals side joint face 64, in order to prevent from when carrying out the laser irradiation, other parts (anode portion 6, negative pole part 8) being produced the stress of many degree, preferably will connect face 52 and terminals side joint face 64 is arranged near the outer peripheral face of capacitor element 4, specifically, preferably be in from the outer peripheral face of capacitor element 4 for example 10 (mm) with in the interior scope.
Feature item, the advantage of the double electric layer capacitor 2 of the 1st execution mode of above explanation are listed below:
(1) on anode collector plate 12, cathode collector plate 16, be set in different positions with the join domain of the anode portion 6 of capacitor element 4 and negative pole part 8 with the join domain of anode terminal 10 and cathode terminal 14, therefore can make each electrode portion stablize with being connected of collector plate with collector plate, each outside terminal, can realize the low resistanceization of capacitor element and the reinforcement that is connected.
(2) in an end face side of capacitor element 4, base material by anode bodies 60 forms anode portion 6, base material by cathode 80 forms negative pole part 8, anode portion 6 is connected via anode collector plate 12 with anode terminal 10, negative pole part 8 is connected via cathode collector plate 16 with cathode terminal 14, has therefore realized the simplification that terminal connects.And, can easily connect.
(3) connecting portion shared space occupancy in the spatial portion 24 of shell 20 is extremely low.
(4) on the hush panel 22 as the covering parts, support capacitor element 4 securely.That is, by laser welding, anode portion 6 and the negative pole part 8 of capacitor element 4 is fixed firmly on anode terminal 10 and the cathode terminal 14 via anode collector plate 12, cathode collector plate 16, therefore improved the bearing strength of capacitor element 4.Its result has constituted mechanically firm supporting structure, can improve the vibration strength of product.
(5) gathered a plurality of side edge parts and formed anode portion 6 from being wound on as the anode bodies 60 on the capacitor element 4 of winding element, with these anode portion 6 laser welding in anode collector plate 12, similarly, gathered a plurality of side edge parts and formed negative pole part 8 from cathode 80, with these negative pole part 8 laser welding in cathode collector plate 16, therefore can realize the low resistanceization of capacitor element 4 and double electric layer capacitor 2, can provide equivalent series resistance low product.
(6) owing to utilized anode collector plate 12 and cathode collector plate 16, therefore need not connect protrusion at capacitor element 4.
(7) owing to make the side of anode collector plate 12 or cathode collector plate 16 and outside terminal (anode terminal 10 or cathode terminal 14) become same, therefore both laser irradiations are stablized, can improve change fully and the reliability of connection.
(8) when carrying out the laser irradiation, utilized protective gas; the influence of the splash that therefore can protective capacitor element 4 can not be subjected to the laser heating, circles in the air; capacitor element 4 can be prevented and as the deterioration in characteristics of the double electric layer capacitor 2 of product, reliability can be improved.
(the 2nd execution mode)
The 2nd execution mode discloses the manufacture method of described capacitor.
About the 2nd execution mode, with reference to Fig. 8, Fig. 9 and Figure 10.Fig. 8 is the flow chart of an example of manufacturing process that the double electric layer capacitor of the 2nd execution mode is shown, and Fig. 9 shows the completed state of anode portion and negative pole part, and Figure 10 shows the laser welding operation of collector plate and capacitor element.
This manufacturing process is an example of the manufacture method of capacitor of the present invention, as shown in Figure 8, comprise that the molding procedure (step S12), the 1st of formation operation (step S11), anode portion 6 and the negative pole part 8 of capacitor element 4 and electrode portion (electrode protuberance) connects dipping and the closing step (step S15) of operation (step S13), the 2nd connection operation (step S14), electrolyte.
(1) the formation operation (step S11) of capacitor element 4 and electrode portion (electrode protuberance)
As shown in Figure 3, separator 40,42 is clipped between anode bodies 60 and the cathode 80, centered by coiling central part 46, is wound into cylindricly, form capacitor element 4 thus.In this capacitor element 4, make that the part of anode bodies 60 and cathode 80 is side-prominent at element end face 5, form anode portion 6 and negative pole part 8 as the electrode protuberance.Between anode portion 6 and negative pole part 8, be set with insulation gap 44.
(2) molding procedure (step S12) of anode portion 6 and negative pole part 8
In this molding procedure, shown in the A of Fig. 4, will be divided into the above-mentioned division 6A of portion, 6B, 6C, 8A, 8B, 8C as anode portion 6 and the negative pole part 8 of electrode protuberance, shown in the B of Fig. 4, direction towards coiling central part 46 bends each division portion respectively, carries out moulding (step S12).As shown in Figure 9, this moulding be with the curved shape of anode collector plate 12, cathode collector plate 16 accordingly, be shaped to and can realize the height be close to.In Fig. 9, A and B represent the 6B of division portion, the 6C of the anode portion 6 that is connected with anode collector plate 12 and the bending state (completed state) of the 8B of division portion, the 8C of the negative pole part 8 that is connected with cathode collector plate 16, A represents to arrange anode collector plate 12 described later and cathode collector plate 16 completed state before, and B represents to arrange anode collector plate 12 and cathode collector plate 16 completed state afterwards.In other words, with anode collector plate 12 and cathode collector plate 16 by being pressed on anode portion 6 and the negative pole part 8, perhaps anode portion 6 and negative pole part 8 are compressed by being pressed on anode collector plate 12 and the cathode collector plate 16, make the 6B of division portion, the 6C of anode portion 6 and the 8B of division portion, the 8C of negative pole part 8 become flat condition thus, be close to anode collector plate 12, cathode collector plate 16.In addition, as shown in Figure 3, also can bend in antianode portion 6 or negative pole part 8, before the moulding, set in advance fold line 43 in anode portion 6 or negative pole part 8.Fold line 43 is formed at and the position of element end face 5 at a distance of certain width (more than the 0.5mm), reduce when bending anode portion 6 or negative pole part 8, to impose on the separator 40 of element endface position, the mechanical stress at 42 position thus, can prevent short circuit that the contact because of anode bodies 60, cathode 80 causes etc.In addition, this fold line 43 is not indentation but rules, and can prevent anode portion 6 and negative pole part 8 buckling when bending.This fold line 43 can be groove, and cross sectional shape can be triangle, quadrangle or bending (R) shape.In the formation of this fold line 43, for example can utilize methods such as punching press, laser, cutting.As shown in Figure 3, fold line 43 both can be 1, also can be formed with many fold lines 43 accordingly with the width of anode portion 6 or negative pole part 8.The formation face of fold line 43 can be the single face of anode portion 6 or negative pole part 8, also can be the two sides.Fold line 43 as an example forms, with coiling central part 46 face in opposite directions of element end face 5 be towards interior lateral buckling.
(3) the 1st connect operation (step S13)
Connect in the operation (step S13) at this, shown in the A of Figure 10, anode collector plate 12 is positioned the anode portion 6 of capacitor element 4, cathode collector plate 16 is positioned the negative pole part 8 of capacitor element 4, shown in the B of Figure 10, by laser welding anode collector plate 12 is connected on the anode portion 6, and by laser welding cathode collector plate 16 is connected on the negative pole part 8.In this laser welding, by inert gases such as argon gas, helium are used as protective gas, come capacitor for voltage protection element 4 thus, the splash that makes capacitor element 4 be located away from the laser heating and circle in the air.
(4) the 2nd connect operation (step S14)
Connect in the operation (step S14) at this, as shown in Figure 7, the connection of the anode collector plate 12 that will be connected with anode portion 6 facial 52 is merged into same with the terminals side joint face 64 that is positioned at the anode terminal 10 on the hush panel 22, connects by laser welding.Similarly, with cathode collector plate 16 that negative pole part 8 is connected on, connect the cathode terminal 14 of hush panel 22 by laser welding.In this laser welding, by inert gases such as argon gas, helium are used as protective gas, come capacitor for voltage protection element 4 thus, the splash that makes capacitor element 4 be located away from the laser heating and circle in the air.
In this embodiment, shown in the A of Fig. 7, the anode terminal 10 of hush panel 22 is positioned the anode collector plate 12 that is connected with the anode portion 6 of capacitor element 4, simultaneously the cathode terminal 14 of hush panel 22 is positioned the cathode collector plate 16 that is connected with the negative pole part 8 of capacitor element 4, shown in the B of Fig. 7, carry out laser welding respectively thus.The 18th, the described portion that is welded to connect.
In addition, about hush panel 22, mold synthetic resin (embedding moulding) by embedding anode terminal 10 and cathode terminal 14, form base portion 26 and closure 28 thus.
(5) electrolyte dipping and closing step (step S15)
After capacitor element 4 be impregnated in electrolyte, be received in the shell 20, the crimping of the open end 34 by shell 20 handles to seal (step S15), finishes the double electric layer capacitor 2 (Fig. 1) as product.
Utilize such manufacturing process, can easily produce above-mentioned double electric layer capacitor 2, can realize that terminal connects the simplification of operation, the capacitor that can realize having the effect of narrating in the 1st execution mode.
(the 3rd execution mode)
The 3rd execution mode discloses the configuration of outside terminal and the form of collector plate.
About the 3rd execution mode, with reference to Figure 11.Figure 11 shows the collector plate of the 3rd execution mode and being connected of outside terminal, before A represents to connect, and the laser irradiation during B represents to connect.
Shown in the A of Figure 11, the anode terminal 10 that arranges in the hush panel 22 of this execution mode and cathode terminal 14 dispose near the coiling central part 46 of the element end face 5 of capacitor elements 4.And the terminals side joint face 64 of anode terminal 10 and cathode terminal 14 moves back towards coiling central part 46 rear flank from the outer peripheral face of capacitor element 4.
For such anode terminal 10, cathode terminal 14 and terminals side joint face 64, in this embodiment, shown in the A of Figure 11, be formed with the recess 70 that moves back towards coiling central part 46 rear flank at terminal connecting portion 56A, the 58A of anode collector plate 12 and cathode collector plate 16.In this recess 70, be formed with the above-mentioned face 52 that is connected accordingly with the terminals side joint face 64 of anode terminal 10 or cathode terminal 14.In this case, in anode collector plate 12 or cathode collector plate 16, element connecting portion 56B, 56C have constituted with respect to the side surface part of terminals side joint face 64 towards the outstanding par of the peripheral direction of capacitor element 4.
Shown in the A of Figure 11, according to such structure, even configuration anode terminal 10, cathode terminal 14 close to the coiling central part 46 of the element end face 5 of capacitor element 4, also can and connect facial 52 with terminals side joint face 64 and be maintained same, can carry out the connection by laser irradiation 68 realizations identical with above-mentioned execution mode.
In addition, in this embodiment, though formed recess 70 at anode collector plate 12 and cathode collector plate 16, also can utilize protuberance to form and connect facial 52.
(the 4th execution mode)
The 4th execution mode discloses other form of collector plate.
About the 4th execution mode, with reference to Figure 12.Figure 12 shows being connected of the collector plate of the 4th execution mode and collector plate and outside terminal, and the collector plate before A represents to be connected with capacitor element, B represent that the laser during C represents to connect shines with before outside terminal is connected.
Shown in the A of Figure 12, the collector plate 12, the 16th of this execution mode is provided with at interval 61 and the form of the element end face 5 of covering capacitor element 4, and side is formed with the recess 69 of taking in the 6A of division portion, 8A overleaf.In this collector plate 12,16 face portion, to form fan-shaped teat 71 with the 6A of division portion of capacitor element 4, the coupling part of 8A, and across this teat 71, be formed with the 6B of division portion, 6C, 8B, 8C corresponding concave part 73,75 with capacitor element 4. Recess 73,75 has constituted the par, described par with respect to as the anode terminal 10 of outside terminal or the connecting portion of cathode terminal 14, outstanding towards the peripheral direction of capacitor element 4.On teat 71, be formed with notch 77 at peripheral side, will form circular-arc in the face of the circumference of this notch 77 and formed joint face 79 with anode terminal 10 or cathode terminal 14.In recess 73,75 sides, be formed with the jut 81 of rectangular shape, as the unit of controlling (blocking) collector plate 12,16 simultaneously.
Shown in the B of Figure 12, the collector plate 12 of this execution mode, 16 modes with the element end face 5 of covering capacitor element 4 arrange, anode portion 6 is connected by laser welding with the recess 73,75 of anode collector plate 12, equally, negative pole part 8 is connected by laser welding with the recess 73,75 of cathode collector plate 16.
And, shown in the C of Figure 12, with anode collector plate 12 that capacitor element 4 is connected on overlapping anode terminal 10, overlapping cathode terminal 14 on cathode collector plate 16, make the terminals side joint face 64 of anode terminal 10 align with the joint face 79 with same curved surface, similarly make the terminals side joint face 64 of cathode terminal 14 align with the joint face 79 with same curved surface, thereby position.Carry out laser irradiation 68 according to this positioning states, thus each collector plate 12,16 is connected with anode terminal 10 or cathode terminal 14. Recess 73,75 constituted with respect to be positioned at the joint face 79 that is connected with anode terminal 10 or cathode terminal 14 on the teat 71, namely with the side surface part of terminal component welding, towards collector plate 12,16 the outstanding par of peripheral direction.Can utilize the element end face 5 of this par covering capacitor element 4.
In described structure, the element end face 5 of capacitor element 4 is covered by collector plate 12,16, and the laser that element end face 5 that can protective capacitor element 4 can not be subjected to joint face 79 sides shines the influence that 68 caused splashes circle in the air.And joint face 79 forms the curved surface that the curved surface with anode terminal 10, cathode terminal 14 matches, and therefore can make joint face 79 and the terminals side joint face 64 of anode terminal 10, cathode terminal 14 weld alignedly.In other words, can carry out good laser welding.
(the 5th execution mode)
Any one party that the 5th execution mode discloses in hush panel, outside terminal or collector plate arranges positioning unit, and utilizes positioning unit to determine the situation of the link position of outside terminal and collector plate.
About the 5th execution mode, with reference to Figure 13.Figure 13 shows the hush panel of the 5th execution mode, and A represents that from the hush panel of rear side observation B represents to utilize anode collector plate and the cathode collector plate after hush panel is located.
Shown in the A of Figure 13, rear side in the hush panel 22 of this execution mode, in the spatial portion between anode terminal 10 and cathode terminal 14, be formed with the positioning convex portion 72 that is constituted by insulating material, make this positioning convex portion 72 outstanding towards the coiling central part 46 of capacitor element 4 (Fig. 1).This positioning convex portion 72 possesses cylindrical portion 74 and pair of plates shape wall portion 76.Cylindrical portion 74 is trunk portion corresponding with the circular arc of anode collector plate 12 and cathode collector plate 16 circular-arc notch 50 separately.Cylindrical portion 74 possesses tabular wall portion 76, centered by this cylindrical portion 74, about have the tabular wall portion 76 at the interval 61 of keeping between anode collector plate 12 and the cathode collector plate 16.
If possess the hush panel 22 that comprises such positioning convex portion 72, then can utilize positioning convex portion 72 that anode collector plate 12 and cathode collector plate 16 are positioned at assigned position, will 61 be maintained Rack w at interval.Namely, cylindrical portion 74 by positioning convex portion 72, the circular-arc notch 50 of chimeric anode collector plate 12 and cathode collector plate 16, make each anode collector plate 12 and cathode collector plate 16 contact the side of each tabular wall portion 76, thus anode collector plate 12 and cathode collector plate 16 are positioned at assigned position.By this location, can make that the terminals side joint face 64 of anode terminal 10 is consistent with the connection facial 52 of anode collector plate 12, and make that the terminals side joint face 64 of cathode terminal 14 is consistent with the connection facial 52 of cathode collector plate 16, make by the connection of laser irradiation realization stable, can improve the connection precision, and utilize positioning convex portion 72, with the isolation of insulating reliably of anode portion 6 and negative pole part 8.
In addition, in this embodiment, though be to have formed positioning convex portion 72 in hush panel 22 sides, also externally on any one party in terminal (anode terminal 10, cathode terminal 14) or the collector plate (anode collector plate 12 and cathode collector plate 16) positioning unit is set.According to this structure, also can determine the link position of outside terminal and collector plate by positioning unit, can realize sameization of coplanar laser illumination uniformly, realize the stabilisation of connection, realize the high connection of reliability.
(the 6th execution mode)
The 6th execution mode discloses the mode that possesses connecting plate with collector plate independently.
About the 6th execution mode, with reference to Figure 14.Figure 14 shows the double electric layer capacitor of the 6th execution mode.
As shown in figure 14, in the 6th execution mode, constitute: as the anode terminal parts, possess anode terminal 10 and anode connecting plate 88, as the cathode terminal parts, possess cathode terminal 14 and negative electrode connecting plate 90.Anode connecting plate 88 by laser welding with after anode terminal 10 is connected, be connected on the anode collector plate 12 of capacitor element 4 sides.Similarly, negative electrode connecting plate 90 by laser welding with after cathode terminal 14 is connected, be connected on the cathode collector plate 16 of capacitor element 4 sides.The connection that is formed with the anode terminal 10 that is located by connecting at anode connecting plate 88 is with recess 92, and the connection that is formed with the cathode terminal 14 that is located by connecting at negative electrode connecting plate 90 is with recess 94.In addition, in the part of the side face of anode connecting plate 88 and negative electrode connecting plate 90, be formed with the connection face 96 corresponding with the connection facial 52 of anode collector plate 12 or cathode collector plate 16, this connects face 96 and is connected same of facial 52 formations, is electrically connected by implementing laser welding.
In the structure of having used such anode connecting plate 88 and negative electrode connecting plate 90, can carry out anode terminal 10, the cathode terminal 14 as outside terminal on a large scale and be connected to being connected of anode collector plate 12, cathode collector plate 16 of capacitor element 4 sides, connection resistance can be reduced, and bonding strength can be improved.
(the 7th execution mode)
The 7th execution mode discloses the welding between collector plate and the terminal.
About the anode collector plate 112 of the 7th execution mode and the welding between the anode terminal 110 (perhaps cathode collector plate 116 and cathode terminal 114), with reference to Figure 15.Figure 15 shows the welding portion of anode collector plate 112 and anode terminal 110 enlargedly.
About anode collector plate 112, for example aluminium sheet is forged processing, it connects facial 152 upper surface or lower surfaces with respect to anode collector plate 112 and constitutes the inclined plane.As an example, connecting facial 152 is the inclined planes that tilt towards clockwise direction with respect to vertical, and the edge portion of contact-making surface 165 sides becomes flexure plane.In addition, about anode terminal 110, for example also be that aluminium sheet is forged processing, its terminals side joint face 164 constitutes the inclined plane towards anode collector plate 112, terminals side joint face 164 as an example is the inclined planes that tilt towards counter clockwise direction with respect to vertical, and edge portion and the anode collector plate 112 of contact-making surface 165 sides similarly become flexure plane.Therefore, have the part be close to each other in contact-making surface 165 sides and open noncontact portion 167 agley on above-below direction each other.Such anode collector plate 112 also is the same with the form of anode terminal 110 in the relation of cathode collector plate 116 and cathode terminal 114.
The irradiation center (irradiation position 171,173) of laser beam 169 is set in the position different with the contact-making surface 165 of such anode collector plate 112 and anode terminal 110.Irradiation position 171 is positions of contact-making surface 165 deflection tops from figure, and irradiation position 173 is positions of contact-making surface 165 deflection belows from figure.This irradiation position 171, the 173rd, the position different with contact-making surface 165 is so long as the position that contact-making surface 165 can be included in the scope of the nugget 118 (Figure 17) that is formed by laser beam 169 gets final product.
About the welding form of this laser beam 169, with reference to Figure 16.In the welding form of laser beam 169, perforation (keyhole) welding shown in the B of the heat conduction weld shown in the A of Figure 16 and Figure 16 is arranged.Can adopt any welding form in the welding between metal, but, in piercing welding, owing to be that sharp-pointed focus 175 with laser beam 169 shines solder side, therefore can produce sharp-pointed and huge nugget 118, with the growth of nugget 118 correspondingly, form a plurality of splashes 177 sometimes.
Relative therewith, in heat conduction weld, be made as focus 175 and be in the irradiation position 171 of laser beam 169,173 the mode that defocuses nearby, form the big irradiation portion 179 of bore at irradiation position 171,173 places.In this irradiation portion 179, compare with sharp-pointed focus 175, produce the heat conduction lentamente, form nugget 118 slowly.That is, in heat conduction weld, be created on the nugget 118 that has divergence on the radial direction of irradiation portion 179.In this soldering, defocus by making laser beam 169, enlarge nugget size thus, make piercing welding transfer to heat conduction weld.
In addition, about described irradiation position 171,173 and welding energy, the center of irradiation position 171,173 expression laser beams 169.In addition, the range of exposures of laser beam 169 is identical with the nugget size (Figure 17) of nugget 118.Therefore, if change this center (in other words, irradiation position is not non-contact site 167, but make irradiation position become tabular surface), then needn't be in the welding energy of weld part office reduction as the center of the ceiling capacity of laser beam 169, energy can be provided efficiently, can obtain the desirable nugget degree of depth (welding scope).
About the nugget 118 that forms by such heat conduction weld, with reference to Figure 17.In the A of Figure 17, the irradiation center of laser beam 169 is set in irradiation position 171 places to be shone, its illumination mode is by defocusing to enlarge nugget size, in the B of Figure 17, the irradiation center of laser beam 169 is set in irradiation position 173 places shines, its illumination mode is by defocusing to enlarge nugget size.That is, in the A of Figure 17, the nugget center O is set at than contact-making surface 165 more by top among the figure, in the B of Figure 17, the nugget center O is set at than contact-making surface 165 more by below among the figure.
In such heat conduction weld, though irradiation position 171 or irradiation position 173 are from contact-making surface 165 deflection top or belows, but in the nugget 118 that has enlarged nugget size, contain into contact-making surface 165, thereby with anode collector plate 112 and anode terminal 110 welding.In this Figure 17,
Be nugget size, Nd is the nugget degree of depth, and Wd is the depth of weld.Because nugget size
Greatly, and nugget 118 compares with piercing welding more close to flat partially, therefore obtained the depth of weld Wd (≒ Nd equal with nugget degree of depth Nd).In other words, welding precision and weld strength have been improved thus.In addition, be set in 0.5 (mm) by the difference in size with nugget degree of depth Nd and depth of weld Wd, can obtain desirable weld strength.
In addition, in the external of nugget 118, the part of being close to each other in contact-making surface 165 sides before the welding and open noncontact portion's 167 fusings and become one agley on above-below direction each other generate mild face 181 thus.
In addition, in this embodiment, though the irradiation position 171, the 173rd of laser beam 169 or electron beam, with the vertical direction of contact-making surface 165 on different with contact-making surface 165, also can with direction that contact-making surface 165 intersects on different with contact-making surface 165.
According to the 7th execution mode, can obtain following effect.
(1) in the above-described embodiment, use laser beam 169, but also can use electron beam to replace laser beam 169.In this embodiment, laser beam 169 or electron beam are shone the position different with the contact-making surface 165 of anode collector plate 112 or cathode collector plate 116 and outside terminal parts, therefore can and collector plate and outside terminal parts between the state of contact-making surface irrespectively both are welded.
(2) laser beam 169 can be selected any one position in the irradiation position 173 of irradiation position 171, anode collector plate 112 (perhaps cathode collector plate 116) side of outside terminal side, can select any one tabular surface and illuminating laser beam or electron beam.In the illumination mode of such laser beam 169 or electron beam, under the low situation of the machining accuracy of the contact-making surface of anode collector plate 112 (perhaps cathode collector plate 116) and outside terminal parts, even it is and gapped, also can obtain best welding scope, can improve welding precision, weld strength between collector plate and the outside terminal parts.
(3) use the lower metal material of hardness ratios such as aluminium in anode collector plate 112 (perhaps cathode collector plate 116), the outside terminal parts, waiting under the situation of processing by forging processing, had the limit in machining accuracy.Can't avoid the gap that produces between the contact-making surface between anode collector plate 112 (perhaps cathode collector plate 116) and the outside terminal parts.Under these circumstances, by making the irradiation position 171,173 different with contact-making surface 165 of described laser beam, electron beam, can improve welding precision.
(4) if make laser beam 169 or electron beam irradiation position 171,173 with direction that contact-making surface 165 intersects on different with contact-making surface 165, but its size and scope thereof for example are preferably ± 0.1～± 0.5 (mm).By being set at this scope, contact-making surface 165 can be included in the welding scope of laser beam 169 or electron beam.
As long as the degree of depth of the nugget 118 of laser welding or electron beam welding can realize welding, for example be preferably below 1.2 (mm).If be set at this scope, can make that then the range of exposures of laser beam 169 or electron beam is suitable, need not to increase the gauge of collector plate and outside terminal parts, can avoid the maximization of capacitor.
(the 8th execution mode)
The 8th execution mode discloses the welding between collector plate and the terminal.
About the welding of anode collector plate 112 with anode terminal 110 (the perhaps cathode collector plate 116 and cathode terminal 114) of the 8th execution mode, with reference to Figure 18.Figure 18 shows the weld part of anode collector plate 112 and anode terminal 110 enlargedly.
About anode collector plate 112, for example aluminium sheet is forged processing, as an example, being formed with the cross section at facial 152 places of connection is leg-of-mutton cap 153.Anode terminal 110 also is same, for example aluminium sheet is forged processing, has formed taper surface 163.If make that the angle of this taper surface 163 is consistent with the angle of inclination of the interior sidewall surface of cap 153, then can make both match.In this case, can produce gap etc. according to machining accuracy at contact-making surface 165 places.In other words, possess the part be close to each other in contact-making surface 165 sides and open noncontact portion 167 agley on above-below direction each other.Such anode collector plate 112 also is the same with the form of anode terminal 110 in the relation of cathode collector plate 116 and cathode terminal 114.
The irradiation center (irradiation position 171) of laser beam 169 is set in contact-making surface 165 consistent location places with such anode collector plate 112 and anode terminal 110.Irradiation position 171 can be consistent with contact-making surface among the figure 165, also can be the position different with contact-making surface 165.
Situation about illustrating in the welding form of this laser beam 169 and the 7th execution mode is identical, therefore omits its explanation.
About the nugget 118 that forms by heat conduction weld, with reference to Figure 19.In Figure 19, at irradiation position 171 place's illuminating laser beams 169, its illumination mode is by defocusing to amplify nugget size.That is, in Figure 19, though it is consistent with contact-making surface 165 to be set at the nugget center O, also can be set in top among the figure or below (with direction that contact-making surface 165 intersects on different with contact-making surface 165).
In such heat conduction weld, because irradiation position 171 is consistent with contact-making surface 165, therefore, in the nugget 118 that nugget size is exaggerated, contain into contact-making surface 165, thereby with anode collector plate 112 and anode terminal 110 welding.In this Figure 19,
Be nugget size, Nd is the nugget degree of depth, and Wd is the depth of weld.Because nugget size
Greatly, and nugget 118 compares with piercing welding more close to flat partially, therefore obtained the depth of weld Wd (≒ Nd equal with nugget degree of depth Nd).In other words, can improve welding precision and weld strength thus.
In addition, in the external of nugget 118, the part of being close to each other with the caps 153 of contact-making surface 165 sides before the welding and each other on above-below direction agley open noncontact portion 167 melt and become one, generate mild face 181 thus.
In addition, shown in the A of Figure 20, can or arrange in the side scope of collector plate of cap 153 at cap 153, make the irradiation position 171 of laser beam 169 than contact-making surface 165 more by the top and difference, perhaps shown in the B of Figure 20, than contact-making surface 165 more on the lower and different.In this case, in the nugget 118 that nugget size is exaggerated, also contain into contact-making surface 165, thereby antianode collector plate 112 welds with anode terminal 110.In this Figure 20,
Be nugget size, Nd is the nugget degree of depth, and Wd is the depth of weld.Because nugget size
Greatly, and nugget 118 compares with piercing welding more close to flat partially, therefore obtained the depth of weld Wd (≒ Nd equal with nugget degree of depth Nd).In other words, can improve welding precision and weld strength thus.In addition, be set in 0.5 (mm) by the difference in size with nugget degree of depth Nd and depth of weld Wd, can obtain desirable weld strength.
According to the 8th execution mode, can obtain the effect identical with the effect narrated in the 7th execution mode.
(the 9th execution mode)
The 9th execution mode discloses the laser irradiation output control at sealing wire.As mentioned above, in the manufacture method of capacitor, comprise following operation: the element end face 5 at capacitor element 4 forms anode portion 6 and negative pole parts 8, respectively anode portion 6 welding anode collector plates 12, on negative pole part 8 welded cathode collector plate 16 and connecting.In this connects operation, set sealing wire from the welding starting point to the welding terminal point at collector plate, interim ground and change continuously to the wire harness of this sealing wire irradiation and export to carry out light beam irradiates.
Figure 21 shows sealing wire and the laser output of the 9th execution mode.
About the welding that is realized by this laser irradiation, with reference to Figure 21, the A of Figure 21 is the sealing wire 218 on anode collector plate 12 or the cathode collector plate 16.To be set at interval a, b, c between the welding starting point 218S of this sealing wire 218 and the welding terminal point 218E, and outside welding terminal point 218E, set interval d.
In this laser welding, as an example of wire harness illumination unit, used optical-fiber laser irradiation unit 264, sealing wire 218 is based on the weld part of laser irradiation.In this case, use protective gas such as argon gas or helium, carry out soldering.
In the irradiation of the laser of this optical-fiber laser irradiation unit 264, with fixing irradiation speed, interim ground and change wire harness output continuously on sealing wire 218.In this embodiment, shown in the B of Figure 21, laser output P is set at the fixed value of laser output Pa in interval a, in interval b, be set at laser output Pb (＜Pa) fixed value, in interval c from laser output Pb decay to laser output Pc (＜Pb).The laser output Pa of interval a is set to peak, is 50 (W)～3000 (W) as an example.The laser output Pb of interval b exports Pa less than laser, is the laser output below 90% of laser output Pa.In addition, the laser of interval c output Pc is the value less than laser output Pb, is the laser output below 80% of laser output Pa.In this case, the transverse axis of the B of Figure 21 is represented distance (mm).
Laser output Pa in welding starting point 218S place's irradiation is set to peak, and a is set to the time shorter than interval b between its irradiated region.After interval a, the interval b of the laser irradiation of laser output Pb is set to the longest.In addition, interval c is set to the time shorter than interval b, in the c of this interval, laser is exported the Pb straight line decay to laser output Pc.Like this, can near welding starting point 218S and welding terminal point 218E, make the laser output attenuatoin.In other words, preferably has the interval decay that has laser output more than 2 at least.
Laser scanning speed to sealing wire 218 is fixed speed, for example can be the fixed speed of selecting from 300 (mm/ second)～3000 (mm/ second), but can change sweep speed according to the interval.
About sealing wire, can be in each welding position corresponding with anode portion 6 of anode collector plate 12, cathode collector plate 16 and adjacent regions corresponding each welding position of negative pole part 8, set a plurality of sealing wires, carry out multiple welding.
According to the 9th execution mode, can obtain following effect.
(1) interim ground and continuously the decay laser corresponding with sealing wire 218 from the starting point 218S of the laser welding of the anode portion 6 of anode collector plate 12 or cathode collector plate 16 and capacitor element 4 or negative pole part 8 to terminal point 218E export, therefore can make that the welding energy that imposes on collector plate and electrode protuberance is even, can improve connectivity.
(2) set laser output higher at the starting point 218S place of laser irradiation, carry out the laser irradiation with higher laser output energy.Be subjected to the anode collector plate 12 of laser irradiation or sealing wire 218 and near the portion thereof of cathode collector plate 16 and anode portion 6 or negative pole part 8 and obtain heating.That is, if carry out laser irradiation along sealing wire 218, then with the scanning of laser irradiation accordingly, heating is moved with chain state together with this scanning, therefore, is not set at identically even laser is not exported, and becomes molten state also chainly.Therefore, even if make laser output stage ground and (above-mentioned execution mode), interim ground or decay continuously continuously, can make that also the heat energy of the laser irradiation that imposes on weld part is even.Therefore, improved the connectivity of anode collector plate 12 or cathode collector plate 16 and anode portion 6 or negative pole part 8.
(3) in hypothesis laser output is maintained under the constant situation, can produce the excessive place of heat energy, because it is thin to form the electrode of electrode protuberance, therefore can be owing to excessive centralized heat energy produces the fusion inequality, make the connectivity instability of collector plate and electrode protuberance, but can avoid this problem by the decay of laser output.
(the 10th execution mode)
The 10th execution mode discloses the control of the irradiating angle of laser welding.
Figure 22 shows an example of laser irradiating angle and the solder side of the 10th execution mode.
Each collector plate 314A, 314B are that benchmark arranges with the element center 321 of the element end face 306 of capacitor element 304, are connected with anode portion 308 or the negative pole part 310 of capacitor element 304.Therefore, to have constituted with element center 321 be the arc surface of benchmark to the joint face 324 of each terminal weld part 320 of each collector plate 314A, 314B.
To this, as shown in figure 22, for being arranged on terminal anode terminal 330A or cathode terminal 330B on facial 322 are set, make joint face 340 consistent with joint face 324.The laser emitting portion 346 that makes laser irradiation device 344 is towards solder side 324,340 and arrange.
If the distance between laser emitting portion 346 and joint face 324,340 the illuminated laser spot 348 is Ld, even be pivot with element center 321, along the direction rotary laser irradiation unit 344 of arrow N, also can keep distance L d.And, if the anglec of rotation of the laser irradiation device 344 centered by illuminated laser spot 348 is θ, if θ is set at the welding scope with this anglec of rotation, then can on joint face 324,340, as one man carry out laser irradiation 342 with identical distance L d, weld.If the distance L d of laser irradiation 342 is identical, and can carry out stable laser irradiation 342 continuously, then can carry out uniform soldering, can improve the reliability of connection.In addition, also can replace the rotation of laser irradiation device 344 and constitute: be that pivot rotary capacitor element 304 welds with element center 321.
As an example of this terminal connection operation, make laser irradiation device 344 centered by the element center 321 of capacitor element 304, rotate predetermined angular θ and carry out laser irradiation 342, carry out the welding of anode terminal 330A and collector plate 314A.Then, make capacitor element 304 reverse (half rotation) and towards illuminated laser spot 348, the cathode terminal 330B that configuration and laser irradiation device 344 are relative and the joint face 324,340 of collector plate 314B.Under this state, make laser irradiation device 344 towards element center 321, rotate described predetermined angular θ and carry out laser irradiation 342, weld.
Handle about this laser welding, as shown in figure 23, joint face 324,340 is similarly welded, and by weld part 350 anode terminal 330A (cathode terminal 330B) is connected with collector plate 314A (314B).When carrying out this welding, carry out laser irradiation 342 at illuminated laser spot 348, this laser irradiation 342 is to carry out in the environment of inert gases such as argon gas.
In addition, by being positioned at the anode portion 308 (negative pole part 310) that element covering portion 326 on collector plate 314A, the 314B comes covering capacitor element 304 sides, therefore can protect the influence that anode portion 308 (negative pole part 310) and capacitor element 304 can not be subjected to the splash that generates in laser irradiation 342, the laser welding.
According to the 10th execution mode, can obtain following effect.
(1) terminal component possesses the 2nd joint face 340 that mates with the 1st joint face 324 that is connected to the collector plate on the capacitor element, these the 1st and the 2nd joint faces are welded, therefore being connected of collector plate and terminal component can be easily realized, the reliability of connection can be improved.
(2) can improve the welding precision of laser welding or electron beam welding.
(3) can simplify welding sequence, realize connecting rapidization of handling.
(other execution mode)
(1) in the above-described embodiment, as capacitor element, illustration winding element, but be not limited to winding element.Also can be cascade type element, solid-state components.
(2) in the above-described embodiment, the structure that a side (same face) who discloses at the element end face of capacitor element possesses anode portion 6 and negative pole part 8 and is connected with outside terminal, but also can be that element end face a side possesses anode portion, possess the structure of negative pole part at the opposing party's element end face.
(3) in the above-described embodiment, illustration double electric layer capacitor 2, but the invention is not restricted to this.Identical structure and method are equally applicable to electrolytic capacitor, and can obtain identical effect.
(4) in the above-described embodiment, as collector plate, illustration anode collector plate 12, cathode collector plate 16, but the invention is not restricted to above-mentioned execution mode.As the plane that connected facial 52 illustrations, but as the shape that the shape with outside terminal matches, also can be curved surface.About this position that connects facial 52, can be in the face of collector plate or any one party in the side face, also can arrange to connect and use protuberance.
(5) in the above-described embodiment, between anode portion and negative pole part, be provided with insulation gap, but also can in this insulation gap, insulating element be set.
(6) in the above-described embodiment, as welding unit, illustration laser welding, electron beam welding, but the invention is not restricted to this.Also can use arc welding etc.In this case, form and connect facially 52 as long as make the outer peripheral face side of collector plate become convex, and this connections facial 52 and terminals side joint face 64 are carried out arc welding get final product.
(7) in the above-described embodiment, anode portion 6 and negative pole part 8 are formed semi-circular shape, but the invention is not restricted to this.In the middle of the 8A of division portion of the 6A of division portion of the anode portion 6 shown in the execution mode, 6B, 6C, negative pole part 8,8B, 8C, can only form the 6B of division portion, the 6C and 8B, the 8C that are connected with anode collector plate 12 and cathode collector plate 16 highlightedly, and the 6A of division portion of anode portion 6 and the 8A of division portion of negative pole part 8 are given prominence to.
(8) in the above-described embodiment, diverse location as collector plate, by 3 divisions of cutting apart, set as with element connecting portion 56B, the 56C of the element join domain of anode portion 6 and negative pole part 8 or 58B, 58C with as terminal connecting portion 56A, the 58A of terminal join domain at the positive and negative of collector plate, and set different in the horizontal direction positions, but the invention is not restricted to this.Also can be on the part of collector plate setting member join domain (laser irradiation connecting portion 66), set terminal join domain (being welded to connect portion 18) at other position.That is, need only welding position difference on the positive and negative of collector plate, element join domain and terminal join domain are approached.In other words, can be in the element connecting portion 56B as the element join domain, the portion 18 that is welded to connect is not set with the overlapping position of laser irradiation connecting portion 66 in the welding position in the positive and negative of collector plate.
More than most preferred execution mode of the present invention etc. is illustrated, but the invention is not restricted to foregoing, those skilled in the art can carry out various distortion and change according to the record of claims or the mode invention disclosed main points that are used for carrying out an invention, and such distortion and change obviously are also contained in the scope of the present invention.
Utilizability on the industry
Capacitor of the present invention and manufacture method thereof help terminal to connect structure and the simplification that is connected operation, can improve productivity and reliability, are useful.
(symbol description)
2: double electric layer capacitor
4,304: capacitor element
5,306: the element end face
6,308: anode portion
60: anode bodies
8,310: negative pole part
80: cathode
10,110,330A: anode terminal
12,112: the anode collector plate
14,114,330B: cathode terminal
16,116: cathode collector plate
18: be welded to connect portion
19: retainer belt
20: shell
22: hush panel
24: spatial portion
26: base portion
28: closure
32: the ca(u)lk end difference
34: open end
36: open-work
38: pressure release mechanism
44: insulation gap
52,152: connect facial
64,164: the terminals side joint face
118: nugget
165: contact-making surface
218: sealing wire
314A, 314B: collector plate
326: element covering portion
Claims (22)
1. a capacitor is characterized in that, this capacitor possesses:
Capacitor element, it is to possess the electrode body of anode-side and cathode side and winding element or the non-winding element of the separator between these electrode body;
Sealing part, it will take in the peristome sealing of the housing parts of described capacitor element;
Single or a plurality of electrode protuberances, the element end face that its any one party from described electrode body or both sides protrude from described capacitor element;
Single or a plurality of collector plates, it is connected with described electrode protuberance; And
Terminal component, it is arranged on the described sealing part, and is overlapping with described collector plate, and the side surface part of this terminal component is soldered on the described collector plate.
2. capacitor according to claim 1 is characterized in that,
Described electrode protuberance is the aggregate that the part by described electrode body forms, and, and engages with described collector plate on described element end face towards the element central part brake forming of described capacitor element.
3. capacitor according to claim 1 and 2 is characterized in that,
Described electrode protuberance is any one party or the both sides in anode protuberance, the negative electrode protuberance, described anode protuberance protrudes from the element end face from the described electrode body of the anode-side of described capacitor element, and described negative electrode protuberance protrudes from and described element end face components identical end face or different element end face from the described electrode body of the cathode side of described capacitor element.
4. capacitor according to claim 3 is characterized in that,
Be arranged at described anode protuberance and described negative electrode protuberance under the situation of identical described element end face of described capacitor element, will insulate between described anode protuberance and the described negative electrode protuberance by insulation gap or insulating element are set.
5. according to each the described capacitor in the claim 1～4, it is characterized in that,
Described collector plate possesses:
Single or a plurality of the 1st welding are facial, its with the described element end face of described capacitor element on single or a plurality of welding faces of forming in part or all of single or a plurality of electrode protuberances of forming weld; And
The 2nd welding is facial, and it is arranged at and the facial side surface part of intersecting of described the 1st welding, with described terminal component welding.
6. according to each the described capacitor in the claim 1～5, it is characterized in that,
Described electrode protuberance possesses:
A plurality of division portion, its centered by the element central part of described element end face according to the rules angular divisions form, with the center position bending of identical or different angle of bend to described element end face; And
Single or a plurality of welding are facial, and it is formed on the described element end face by described division portion.
7. according to each the described capacitor in the claim 1～6, it is characterized in that,
Possess the par at described collector plate, this par with respect to the side surface part of described terminal component welding, outstanding towards peripheral direction.
8. according to each the described capacitor in the claim 1～7, it is characterized in that,
Described terminal component is welded on the described collector plate by laser welding or electron beam welding, and the irradiation position of laser beam or electron beam is different from the contact-making surface of described collector plate and described terminal component.
9. according to each the described capacitor in the claim 1～8, it is characterized in that,
This capacitor possesses weld part, this weld part covers the contact-making surface of described collector plate and described terminal component by the covering portion on described collector plate or the described terminal component of being formed at, by welding described collector plate and described terminal component to described covering portion's illuminating laser beam or electron beam.
10. according to each the described capacitor in the claim 1～9, it is characterized in that,
The described irradiation position of described laser beam or described electron beam is consistent with the contact-making surface of described collector plate and described terminal component, perhaps with direction that described contact-making surface intersects on different with described contact-making surface.
11. the described capacitor of each according to Claim 8～10 is characterized in that,
The nugget degree of depth of described laser welding or described electron beam welding is below 1.2 (mm).
12. the manufacture method of a capacitor is characterized in that, comprises following operation:
The capacitor element as winding element or non-winding element for the electrode body that possesses anode-side and cathode side and the separator between these electrode body, make described electrode body protrude from the element end face of described capacitor element, form single or a plurality of electrode protuberances at described element end face; And
The terminal component that is arranged on the sealing part is overlapping with the single or a plurality of collector plates that are connected in described electrode protuberance, the side surface part of described terminal component and the side surface part of described collector plate are welded, and described sealing part will be taken in the peristome sealing of the housing parts of described capacitor element.
13. the manufacture method of capacitor according to claim 12 is characterized in that,
This manufacture method also comprises the operation that the side surface part of described collector plate is positioned the described side surface part of described terminal component,
Making becomes common face between the described side surface part and implements described welding.
14. the manufacture method according to claim 12 or 13 described capacitors is characterized in that,
This manufacture method comprises following operation:
Described terminal component and described collector plate is overlapping, described terminal component is contacted with described collector plate; And
Make the irradiation position of laser or electron beam be different from the contact-making surface of described collector plate and described terminal component, described collector plate and described terminal component are welded.
15. the manufacture method according to each the described capacitor in the claim 12～14 is characterized in that,
This manufacture method comprises following operation:
Possess covering portion at described terminal component or with any one party in the described collector plate that described electrode protuberance is connected, utilize this covering portion to cover the contact-making surface of described terminal component and described collector plate; And
The irradiation position of laser beam or electron beam is set in described covering portion, described collector plate and described outside terminal parts are welded.
16. the manufacture method according to claim 14 or 15 described capacitors is characterized in that,
The described irradiation position of described laser beam or described electron beam is consistent with the contact-making surface of described collector plate and described terminal component, perhaps with direction that described contact-making surface intersects on different with described contact-making surface.
17. the manufacture method according to each the described capacitor in the claim 12～16 is characterized in that,
This manufacture method also comprises following operation:
Overlapping described collector plate on described electrode protuberance on this collector plate, is set sealing wire in the direction of intersecting with the electrode body of described capacitor element, welds along this sealing wire.
18. the manufacture method of capacitor according to claim 17 is characterized in that,
Across insulation gap and a plurality of positions of relative described collector plate, be adjacent to set the described sealing wire more than 2, be welded on the adjacent described sealing wire more than 2 in privileged site place of the element central part of crossing over capacitor element continuously, afterwards, weld the described sealing wire more than 2 at described privileged site position in addition continuously, at a plurality of positions, weld the described electrode protuberance of described collector plate and described capacitor element by the adjacent described sealing wire more than 2.
19. the manufacture method according to each the described capacitor in the claim 12～18 is characterized in that,
This manufacture method also comprises following operation:
At described electrode protuberance described collector plate is set, set from the welding starting point to the sealing wire that welds terminal point at this collector plate, by interim ground or change continuously to the wire harness irradiation of the wire harness output of this sealing wire Continuous irradiation, described collector plate is connected on the described electrode protuberance.
20. the manufacture method according to each the described capacitor in the claim 12～19 is characterized in that,
This manufacture method comprises following operation:
The described element end face that is arranged at described capacitor element and with described collector plate that anode-side or cathode side are connected on, form the 1st circular-arc joint face in the side surface direction of described capacitor element;
Form the 2nd joint face that is concentric circles with the described joint face of described collector plate at the described terminal component that is connected with described collector plate;
Align described the 1st joint face and described the 2nd joint face utilize described capacitor element or to the welding unit of described the 1st joint face and described the 2nd joint face irradiation wire harness, described capacitor element or welding unit are rotated; And
Described the 1st joint face is welded to be connected described collector plate and described terminal component with described the 2nd joint face.
21. the manufacture method of capacitor according to claim 20 is characterized in that,
Element center with described capacitor element is benchmark, forms described the 1st joint face and described the 2nd joint face at concentric disc,
Be pivot with described element center, described capacitor element or described welding unit are rotated.
22. according to Claim 8,9,10 or 11, the manufacture method of each the described capacitor in the claim 14,15,16,19 or 20, it is characterized in that,
Described wire harness is fiber laser beam.
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| JP2010251356A JP2012104621A (en) | 2010-11-09 | 2010-11-09 | Capacitor and manufacturing method thereof |
| JP2010-251356 | 2010-11-09 | ||
| JP2010-251352 | 2010-11-09 | ||
| JP2010251355A JP2012104620A (en) | 2010-11-09 | 2010-11-09 | Capacitor and manufacturing method thereof |
| JP2010251352A JP5764912B2 (en) | 2010-11-09 | 2010-11-09 | Capacitor and manufacturing method thereof |
| JP2010-251355 | 2010-11-09 | ||
| JP2011035484A JP5866772B2 (en) | 2011-02-22 | 2011-02-22 | Capacitor and its terminal connection method |
| JP2011-035484 | 2011-02-22 | ||
| JP2011160248A JP5961940B2 (en) | 2011-07-21 | 2011-07-21 | Capacitor manufacturing method |
| JP2011160247A JP5961939B2 (en) | 2011-07-21 | 2011-07-21 | Capacitor manufacturing method |
| JP2011-160248 | 2011-07-21 | ||
| JP2011-160247 | 2011-07-21 | ||
| PCT/JP2011/006266 WO2012063486A1 (en) | 2010-11-09 | 2011-11-09 | Capacitor and process for production thereof |
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| US20130250475A1 (en) | 2013-09-26 |
| CN103210459B (en) | 2016-08-10 |
| WO2012063486A1 (en) | 2012-05-18 |
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